Rotary motor.



I?. J. DARLINGTON.

ROTARY MOTOR.

AYPLICATION FILED PEB.15, 1907. l

Patented Aug. 26, 1913.

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WLM-IV will. y9ms cui 2 SHEETS-SHEET l.

NVENTOH P. J. DARLINGTON.

ROTARY MOTOR.

APPLICATION FILED FBB.15, 1907.

Patented Aug. 26, 1913.

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9 E Sw WITNESSES ROTARY Application filed Fesruary 15s', 1907.

To aZZ'wo/I; z2? may cancer/n Be it known lmt Piume 5. DARLE@- fioN, of Y'itbmgli, Allegheny eeunty, Pennsylvania/g have invented new and useful mprmement in iuiary Meters and Pumps, of which iiie following e. full, elem, and exact desci'iften, ieference being haci le iie aeeon'ipanying drawings, forming part of lais speeieaion, in which* Figure is :i longitudinal eeion 0' .fi motel; embodying invention; Fig. 2 is :i section mi the line HH of ig. l; Fig. $3 is a vie f similar to Fig. l, but ivi l ef'lindez' minted so timilie plane of sec inni e plane nf the secinn of a Section en the line V-- if 5 zi seeifiii en he line V f L" f3 ami T are eail fiews Uf the heini The mein ienui in iie use f ev minimale by lie rei.

n1 my invenliou Consists ei' whose Walls mensim l Venier i ciiin mid ai double the :man

' Y' L elely through a (l whereby sa'd lie us LS. tliei' i'eziuies of my inseiilien @insist in elle mit ef che eyliiidei' heads, the manlief of e' ing i' 'in lie cylinder, unil other novel eutuies of eensti'uction.

ln lie drawings, i 'lesig'neitee the, Cylinlei nl: lie meier, in which iS :in eeeeni'i- Gully luenied piston eliin'ilier Tlii cheniliei' is of peeulia Simp@ in ernss-secion, in

Specicatnn si Letters Zaent.

A lle peint about e. Seem@ BEUTOR.

Pawnee@ Ang. 2 Serial No. 35352179.

that its bere is approximately the :same distane across in ali diiections'wlien measured e hrough a ifzed eccentric poin. which pein the center of the eccenrically arranged iston shaft 4. The curve which defines 'the inerior Wali of the eylinde? terni :i roeceniie curve, being a ein-ve subsiguially such as is fiescibed by the inm'ement of a poin .around e. cenei, which center is revolving around a second center in the same diection, but double ehe velocity of the is. Centex. The emc; neure 01' this cuive will ers leference to i e 8 posing 'the describing an afm f2: which tuin@ upon the e which eenier i2 in tuen Tomlin@ eme? o, iy Wili he i` Jing pain?, has moved -from Lion 55 so lie posit-ien e the sente? have mevefi to L-ie gmini e abi. lie' c, ma. "ing 'y deelne revelulon from ille pcin tnrned to lia ;roint, iii@ at ille end eff the ai tie point j', and ne l liougli ille peint ZP. oe. that ii is eliaraeleri generaied the escribing pninf tha i" wiil incluse 1a pom i1 which the will meaqme eme* @me ciisanee t mieli pqini is This curve, as will lle seen from the diagium, is Somewhat iieaz'kslmpeil in eempmison Willi ih@ inscribed eii'ele 5.'.

in ery direc ln piaeiee1 the Cuive wiil ne modi led Owing;

to the act'that lie euting tool insiemi nl' being a mere Doinl, is an edge el? Some ilu-eliness fienite frm. From lle foi-eguingA it will be ieadny seen mit if ie pieten bln e 5 of elle motor, having the same. form y 0i erige. be sulisituteel for u. wel of ferm a and be moved in a similzu' manner, will iimin'taiu contact wild he cylinder at imllf edges l'zreugliout a eompiee reifalutiun. The binde may be mm'ed by any of several means. inciuing that arrangement of gearing and eccentries which was used ce romige the tool in forming the eylindei.

For practical Work it is essential filmt l'he edges of the bladebe of sensible thickness or dimension, and not a mere imite edge.

:Preferably the edges are formed on semicircles, as shown.

1, preferred construction. is a blade arranged to move freely through the slot 6 of the pistonshatt e, Whose center corresponds with the point 52. As the piston l lis rotated, both endso the blade will main- 9` tain va Contact with the cylinder wall 'y 'thronghcnt a, complete revolution. The

' shaft shonidbe of sachv diameter as to contact with the vtrail of the cylinder at one malte a fluid tight joint therewith fr, "asfsliownf 'neend ot the motor cylinder'is closed by a head 7 which is preferably shouldered- Within the open end of the cylinder, while the other end of the cylinder is closed by a 2Q head'd which is similarly shouldered Within that'end'. The bore or piston chamber 3 is eccentric to the exterior of the cylinder and it also `is notl a true circle. Hence the ends oftI the cylinder are provided with circular 2'5, Countenbores, shown as concentric ivith the exterior of the cylinder, in .which counterbores the circular shouldered ends of. the heads are seated, shown.y These heads are turned to malte a close fit' with. the cyl- 3@ inder, and the parts are secured together by means of the tension rods il, having threaded ends whichare engaged by' nuts 10 and 1l, the nuts yl0 being seated-in recesses l2 of the head 8 and having abearing 'against the rear- Walls thereof, while the nuts 'l1 havea hearing against the rear end ot the head 7. Instead, however, of employnuts at both ends of these rods., it is evident that a fixed head may be formed at o one end. The heads, together with 'the cylinder, are provided with open groovesl,

in which the rods 9 are seated.

The admission head 7 has an interior chamber le, into which leads an inlet pipe es l5, and which communicates 'with the longitudinal port 16 formed in the thickened `cylinder 'wall through a port 17 in a plug i8 which is seated Within the head 7, and which forms the front wall ot the chamber se lll. Vlfhe port 16 communicates Withthe cyliuder chamber by means of a plurality of cross-ports 19. The head 8 therein an gxhaust port 20 which communicates with a longitudinal exhaust port 2l in the cylin- B der` wall, the latter communicating -with the cylinder chamber by the seriesl of cross- 'ports 22.

l' The piston shaft 4i is journaled in the plug i8 at one end'portion, and. in the head 8' at its opposite end portion, and is extendl ed through said hcad for connection at 23l with ythe tool orshaft to which power is to be applied.

Although l have speeitically described nl invention inconnection with aV motor it will be obvious that the form ot' cylinder as shown and described ,is eopally advantageous for use in pumps, it being immaterial whether the piston is operated by fluid admitted thereto under pressure, or Whether the shaft 4 is rotated by external -power to draw fluid into'the piston chamber and eX- haust it therefrom. it will be further apparent that a cylinder of this kind is capable oi Wide application 'in motors and 75 pumps generally, and that this feature is not limited to the particular form of motor Shown.

By the use of the cylinder such as de-` scribed, asingle piston blade only is required. `This blade at all' times has a fullv depth ot' bearing in the slotted shaft, which gives a blade extension, with consequent displacement and power, which is not possible where separate blades are employed. 35 By reason of this wide bearing of the singleblade in the slot of the shaft, there is very little friction ot the bladeeither in the Slot or on the cylinder Walls.I l/Y'th the usual eccentric types, where each blade has, (at the time of greatest torque`),1a very shallow bearin inthe shaft, the friction of the blade, oth in .the shaft and against the cylinder, is very. large. rlhis friction starts with the action of the blade spring, isincreased by the centrifugal forces acting onA the blade, andby the driving torque ofthe blade in the shaft, and the result is loss of power, limited speed, bad heating and rapid Wear of both blades and cylinder. With the present invention, when running. at high speed,.the two halves of the single' blade almost lbalance each other in centrifugal eiort, and' in consequence the pressure of the blade against the cylinder is in all positions small, and is nothing 'at the critical position representedby the line s, t in Fig. 8. As a result, the loss of power, generation ot heat, and the Wear of the blade and cylinder, is much less than is possible in motors with divided blades, in which 'the centrifugal force against the cylinder is equal to the sum of the two separate blades instead of the difference between the two halves of the single blade, as in the present case. 115 Owing to the fact that no blade springis employed, the initial friction is very small. These advantages `have been fully confirmed by actual test, in which the results Were both remarkable and satisfactory'.

W hat l claim is t l. ln a motor, a cylinder having longitudinally extending admission and exhaust ports, ported heads fitted to the ends of the cylinder, and tension rods connecting the 125 heads, said heads and cylinder having seats for the said rods; substantially as described.

2; ln a motor, a cylinder having a longitlidinally extending admission port, ahead at one end of the cylinder having an admisx trice ly Itherein and having a circular countei'hoe mits end, and a head seating in said counterhoi'e.

4. in a 'Otary machine, a cylinder having a longitudinal piston chamber* located eccentrieally theiin and having 1n its end a circulan eountel'boze concentric with its ex-l temor, and a head seating in said counterborei n '5.` a notarvmachine, a cylinder having a longitudinal piston chamber located eccen- 'trially therein and having in its ends circulatlcounterhores, heads seated in said countei-hores, heads.v

16. In a rotary machine, a cylinder having 'a longitudinal piston chamber therein, heads closing the 1ends oi seid cylinder, and a pisvton shaft journaled in said heads, the rear endof said shaft bein Areduced and seated vxinthe rear head and t e front end ofsaid ,shaft heing of full diameter and projectin .throh h the front head and being provide with eens for the attachment of a tool.

7. In a motor, a cylinder having a longiandftension rods connecting said' 4ports, ported hea tudinally extending Vadmission port, a head at one end oi the cylinder having an admis sion chamber therein, and a bushing member seated within the admis .on chamber and having a hearing for the motor shaft, and also having a port therethrough which connects the chamber with the admission port of the cylinder; substantially as described.

8. In a motor, a cylinder having a longi tudinally extendin admissionport, a head at one end of the eyhnderhaving an admission chamber therein a bushing seated within the admission cham er and havnga port therethrough which connects the chamber with the admission port of the cylinder, and a piston shaft journaled at` one end in said bushing and havinga thrust collar at its rear end engaging Said bushing; substantially as deseribedgxly 9. .nl a motorgga cylinder havin longituadmission an exhaust dinally extendm' i, A

ds fitted in theends of said cylinder, a bushing member seated in one of said heads, and tension rods connecting the said heads and engaging the bushing member; substantially as described.

In testimony whereof, l have hereunto set my hand.

P. J. DABLINGTON. Witnesses:

Jenn Millan, H. l/. Conwm, 

